The Alden children save an old woman's house, land, and all the animals in her animal shelter from greedy contractors.

The Boxcar children uncover a mystery on a train trip from Boston to San Francisco.

While visiting a recent purchase of Grandfather's, a ghost town in the Rocky Mountains, the Aldens encounter a mystery involving a run-down motel and a woman who may be a ghost.

The Boxcar children must track down an instrument thief in time to save Greenfield's music festival from disaster.

While spending two days touring a zoo to see the baby animals, the four Alden children, aged six to fourteen, help catch an escaped monkey, participate in a photography contest, and investigate a missing camera.

The Aldens help a farmer whose honeybees have stopped producing honey and discover a sabotage scheme.

The Aldens investigate when the arrival of several suspicious characters in Greenfield coincides with a mystery involving a popular boy actor.

The Alden siblings investigate an old building in Silver City where unlucky events keep happening.

While sightseeing in Niagara Falls, the Boxcar children investigate a rash of souvenir store thefts. Includes related puzzles, games, and activities.

Taking a shortcut through the Greenfield Cemetery, the Aldens stumble across a local superstition which maintains that visitors are required to leave gifts or suffer the wrath of a malevolent ghost, a suspicious tradition that prompts the children to expose the truth.